Vacuum Press

twizzstyle · Post by **twizzstyle** » Fri Mar 23, 2012 8:57 am

Jibber wrote:Why are people building a setup like this? I just let my pump run for 24h hours...

Thanks, Christoph

I'm with you... vacuum pumps are designed for 100% continuous running. I've had mine run for over a week with no issues (forgot about it, oops!)

OAC · Post by **OAC** » Fri Mar 23, 2012 2:16 pm

Yes, I've switched to continous on the latest builds. I got a problem with "slushy" oil and was told that continous and regulate the ballast would do the trick. It didn't solved it 100%, but much better. I believe the "slush" comes of some reaction with the release wax I use.

SouthLakeBoarder · Post by **SouthLakeBoarder** » Sun Apr 01, 2012 12:45 pm

What sort of pressure would you guys recommend for pressing a snowboard with one of these pumps? I was checking out the boardcrafter videos, and that dude said his pump was running at just under an atmosphere (which I assume means a little less than 15 psi) for 48 hours. Is 15psi+- about normal for this type of project, or is more pressure typically better? Thanks!

hegan · Post by **hegan** » Sun Apr 15, 2012 2:58 pm

would this work for the vacuum pump, or is it to small?
http://www.veneersupplies.com/products/ ... ystem.html

troublemaker · Post by **troublemaker** » Sun Apr 15, 2012 5:32 pm

Seems small to me. It only flows 1.1 CFM, and oil-less but it's built by Gast so probaly a quality pump. I have HVAC vacuum pump that I bought on CraigsList that flows 6CFM for $75 bucks! CraigsList is a great place to find this kind of stuff.

hegan · Post by **hegan** » Sun Apr 15, 2012 6:02 pm

troublemaker wrote:Seems small to me. It only flows 1.1 CFM, and oil-less but it's built by Gast so probaly a quilty pump. I have HVAC vacuum pump that I bought on CraigsList that flows 6CFM for $75 bucks! CraigsList is a great place to find this kind of stuff.

been checking craigslist but nothing at all, and thats for 3 states!

how about this one http://www.veneersupplies.com/products/ ... ystem.html

troublemaker · Post by **troublemaker** » Sun Apr 15, 2012 6:16 pm

Well, I'll look around around here and see what I can find and if I can find something that will work I'll send it to you.

troublemaker · Post by **troublemaker** » Sun Apr 15, 2012 6:18 pm

check this out
http://portland.craigslist.org/mlt/for/2918551277.html

twizzstyle · Post by **twizzstyle** » Mon Apr 16, 2012 8:19 am

SouthLakeBoarder wrote:What sort of pressure would you guys recommend for pressing a snowboard with one of these pumps? I was checking out the boardcrafter videos, and that dude said his pump was running at just under an atmosphere (which I assume means a little less than 15 psi) for 48 hours. Is 15psi+- about normal for this type of project, or is more pressure typically better? Thanks!

You can't have more than 1 atmosphere (~14.7psi at sea level) of pressure with a vacuum pump, unless you use an autoclave. If you're doing vacuum pump, you want to achieve the strongest vacuum you can (1 atm). Only way to get more pressure is autoclave, or go fire hose.

SouthLakeBoarder · Post by **SouthLakeBoarder** » Tue Apr 17, 2012 8:42 am

twizzstyle wrote:
SouthLakeBoarder wrote:What sort of pressure would you guys recommend for pressing a snowboard with one of these pumps? I was checking out the boardcrafter videos, and that dude said his pump was running at just under an atmosphere (which I assume means a little less than 15 psi) for 48 hours. Is 15psi+- about normal for this type of project, or is more pressure typically better? Thanks!
You can't have more than 1 atmosphere (~14.7psi at sea level) of pressure with a vacuum pump, unless you use an autoclave. If you're doing vacuum pump, you want to achieve the strongest vacuum you can (1 atm). Only way to get more pressure is autoclave, or go fire hose.

Ah, I gotcha. I'm still super new to this hobby (as you can likely tell

), and I just wasn't sure what the norm for pressing with a vac was. Thanks for clarifying that!

AllgäuSki · Post by **AllgäuSki** » Thu Apr 19, 2012 6:40 am

My Vacuum Pump gets a pressure of 600 to 700 mbar. It was a very cheap pump (used for like 70€). I'd like to achieve just a little bit more pressure... therefore my question: does it make sense to combine two smaller Vacuum Pumps to get closer to the absolute vacuum? Or does it make more sense to have a closer look at the sealing?

sammer · Post by **sammer** » Thu Apr 19, 2012 7:43 am

Can your pump pull more than that?
Hook your gauge to the port where it sucks and see what you get. Then compare to the chart.
http://www.engineeringtoolbox.com/air-a ... d_462.html
If you're not pulling max for your altitude get a new pump.

If you're getting less at your bag you've gotta deal with your sealing.

sam

hegan · Post by **hegan** » Tue Sep 25, 2012 1:53 pm

worth buying or no?

sammer · Post by **sammer** » Tue Sep 25, 2012 3:43 pm

hegan wrote:worth buying or no?

Wow... Your still looking for a vacuum pump?
That will work but at 1.5cfm's will take a while to evacuate your bag and will have a hard time keeping up to any leaks.
3cfm would be my minimum.
The one I'm using now is 5.5cfm still takes a few minutes to pull full vacuum.

sam

hegan · Post by **hegan** » Tue Sep 25, 2012 4:16 pm

Well I was given one and it ran ok for a little while until it broke last week,
how about this one?

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